#include <QCoreApplication>
#include <iostream>
#include <math.h>
using namespace std;
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    cout << "Vvedite radiys R1 u R2"<<endl;
    int R1,R2;
    cin >>R1;
    cin >>R2;
while(R1>R2)
{
    double S1=(3.14*(R1*R1)) ;
    cout << "Ploshad 1"<<endl;
    cout <<S1<<endl;

    double S2=(3.14*(R2*R2)) ;
    cout << "Ploshad 2"<<endl;
    cout <<S2<<endl;

    double S3=(S1-S2);
    cout << "Ploshad 3"<<endl;
    cout <<S3<<endl;
}
cout <<"Vvedite R1>R2"<<endl;

        return a.exec();
    }

